Comparison of clinical outcomes, demographic, and laboratory characteristics of hospitalized COVID‐19 patients during major three waves driven by Alpha, Delta, and Omicron variants in Tehran, Iran

This study is the first study in which demographic, laboratory data, and outcomes of coronavirus disease‐2019 (COVID‐19) patients due to the circulating SARS‐CoV‐2 infections caused by different variants (Alpha, Delta, and Omicron) are compared in Iran.

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